Question

1)6 Men or 8 Women can do a job in 42 days. 9 Men and 12 Women can do it in how many days?
2)Cheenu takes some loan from Rajesh for 2 year at the rate of 5% per annum and after 2 years, he gave back Rs.6600 to Cheenu and completed the payment of his loan. Find the interest paid by Rajesh.
3)A sum becomes two times in 5 year at a certain rate of interest. Find the time in which the same amount will be 8 times at the rate of interest.

Answer 1

1)
let time by1 man=a by woman=b
6a+8b=42
3a+4b=21
×by 3bothbsides
9a+12b=63Ans.

Answer 2

1)
6men=8women
1men=8/6women

9men=8/6×9 women=12 women
total no. of women=12 +12=24 women

using inverse variation,
8/24=x/42
x=8/24×42
x=13days

hence days require by 9 men and 12 women is equal to 13 days.

HOPE THIS WILL HELP YOU.

2)I am unable to understand the question.SORRY.

3)I am unable to understand the question.SORRY.